Frank



(No Model.) I h F. W. PREUND.

GUN SIGHT No. 49 ,051. Patented Apr .25, 13 93.

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- To all whom it -may cortccrn:

. Cheyenne, in the county of Laramie and Ter-v tion., v

' dusting-so asre avoidthetron'b'l'e'in'ci'deht'to and a perspective view of a modified form. of

base which is adapted to be seated in. adove of rifles,tc in-eet changes in the'conditions .changes to be made with as little del ed to the constrnction'shown in Figs. 1, hand attaching the ordinary sight. Fig. 11 repre- :other modification 0f the base, and Fig. 13.

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; SPECIFIflATIQN fbrmingpart of Letters plication filed October 16, 1384.

Be it known that I, FRANK. wmn'nnno, of

ritory of Wyoming, have inventedcert-ain new and useful Improvements in Sights for Fire: arms, of which the following isa description, reference being had to the accompanying drawings, which forma part of this specifica- My invention relates particularly to rear sights andconsists of a base, which is to be rigidly attached to the barrel, and a series of interchangeable sight platesadapted to be attached to said base, the object being toprovide a sight, or series of sights, which may be' changed at will, and which shall be self adan accurate adjustment of the sights as heretofore constructed. It is often desirable to change the sights of tire arms,-especia lly under which the arm is to be used, or (lifierences in the color or character of the objects to be aimed at, and it is therefore desirable to have aconstruetion which will permit such ay 'and inconvenience as possible.

In the accompanying drawings, Figure l, is a plan view of the ordinary military sight constructedacco'rding to my invention. Fig. 2 is an end view of the same, and Fig. 3, a cross section on theline 3, 3, in Fig. 1. Figs 4, 5, 6, 7, 8 are interchangeable sight plates a apt- 3. Figs. 9 and 10 are respectively an elevation tail groove in the barrel after the manner of sents a series of three interchangeable sight plates adapted to the base shown'in Figs. 9 and 10. Fig. 12 is a perspective-view of anrepresentsa series of two interchangeable plates therefor. Fig, 14 is a perspective view of still another modification of the base, and Fig. 15 a series of sight plates therefor, the said plat'es being shown both in side and edge view.

Patent no. 496,051, dated April 25,1893.

Serial No. 145.698. (No model-l suggest themselves but the illustrations given will be sufficient to convey a clear idea of the nature of the invention.

In Fig. 1,- 1 represents the base piece of the ordinary military sight, which base piece is cross bar 2, which slidesintoa corresponding groove or seat in the barrel. -To this base piece is hinged the leaf 3, which folds'dow'n upon the barrel and carries the sliding sight plate 4, which is used when the leaf is turned up, asis well known and has formed at its base an angular plate 5, which has a sight notch for use at point blank range when the leaf 3, is folded down upon the'barrel.

In constructipg this sight for the applicanon army invention I form the angular plate 5, thicker than common and cut a transverse slot 6, -therein,which slot receives the interchangeable sight plates represented in Figs. 4,5 and 6. These sight plates are shown as formed with slots Sin their lower edges, which slots fit over pins or screws 7 passingthrough the angular plate 5 and its slot 6 and thus make the plates self adjusting. These plates being formed of thin sheet metal may be readily cut out of a sheet of suitable material by a cutting'tool of the required shape. Care is to be taken'that their lower edges which fit into the slbtt andfover the pins or screws 7 shall be exact counterparts of eachother, and that the sight notches or openings shall correspond accurately-as to position, and when so formed two screws 9,- over which the notchesS fit. By

setting up the screws the plates may be se-.v

curelyclamped in-placetoprevent accidental displacement. y'l he screws in' the angular plated may also be used as "clamp screws to Other modifications in construction; may

draw'theparts of the plate together and clam p. 5 the sight'platesfbetween them.

it isclearthat they may be interchanged at sliding plate 4, which for this purpose has The base piece has the central notch 12, and

a vertical recess 11 which receives and holds the rectangular sight plates represented in Fig. 13.

. Fig. 14 represents stillanother modification. In this case the base piece still has the-teentral notch 12, but instead of the vertical recess 11, shown in Fig. 12, it has an. undercut or dovetail recess or cavity 13, formed in one side, which receives the correspondingly shaped rectangular sight plates represented inFig. 13.

- of each other therefore, when .As above stated, I design forming the sight plates out of thin sheet metal, preferably of steel, and they can be stamped or cut from the sheet by any suitable .tool or machine adapted to this purpose. It is immaterial however by What method they are formed, it being only essential to the carrying out of my invention that they De-accurate counterparts so far as the construction by which they are made interchangeable is concerned. So far as the sight notch-or opening is concerned they may be made in any desiredvariety so that the marksman-may always find one suited to the particular occasion, and

which will best suit his eyesight.

The intgrchangeability'of the sight plates obvia'tes lid-necessity of moving the -base piece whehthe said base piece-has been once adjusted it may be rigidly fastened to the barrel and need never be moved.

By the construction shown in Figs. 12, 13 and 15, I am enabled to reverse or invert the sight plates, and by forming sight openings edges a given number of or notches in both piece and slot,and sight is to be changed and 5. This consists of a sight-notch in the upper edge of the plate and an-angular opening with rounded bottom below the same. Lprefer, this for the reason that it adapts the sight to the requirements of persons of varying strength of eyesight, some requiring coarser sight-s than others,

while at the same time it enables the same sight to be used for difiercut distances by sighting through the upper or lower part of said opening without changing the sight. It is also easier to construct since the opening can be made first with an ordinary drill and the upper angle then cut out with a suitable cutting tool or file.

Having thus described my invention, what I claim as new is- 1. An interchangeable sight consisting of a base piece adapted to be attached to the barrel and provided with clamping screws to clamp and hold .a sight plate, and a series of interchangeable sight plates notched to fit over said screws and adapted to be clamped in or upon said base piece as shown and described.

2. Sight for fire arms consisting of a base piece with a vertical recess or slot, 6, therein, clamping screws, 7, passing through said base as'ight plate adapted to tit into said slot and to be clamped therein by the action of said screws, substantially as shown and described.

FRANK. 'W. FREUND.

Witnesses:

L. JACOBS, F. S. license. 

